Exhaust valve of respiratory mask



FIG. 1 is a top plan view of an exhaust valve for a respiratory mask showing my new design;

FIG. 2 is a side elevation thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top perspective view of the valve guiding member shown separately for clarity of illustration;

FIG. 5 is a top perspective view of the valve flap member;

FIG. 6 is a top perspective view of the valve housing;

FIG. 7 is a top perspective view of the exhaust valve in an assembled condition. 

The ornamental design for an exhaust valve of respiratory mask, as shown and described. 